Part TwoSeries Episode Number: 519
World Premiere: Sat 1 Dec 1979 - 6:04pm GMT [BBC One] (United Kingdom)
First Broadcast: Fri 21 Sep 2001 - 10:30pm CDT [Prairie Public Television]
Running Time: 22 minutes 44 seconds
9.60 Million (UK)
Chart Position: 31 () (UK)
Recorded on Tue 14 Aug 1979 in Television Centre 6
The Doctor and Romana are horrified to discover that Tryst has been storing real life forms in his CET machine and that someone is smuggling the dangerous narcotic, Vraxoin.